Duplex strainer



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DHUBERT CHESTER, OF BUFFALO, NEW 'YORKL' nornnx .s'rnnmnn.

Application filed :Ju1y'28, 1922. Serial Noa5'ifi 2 56.

T0 aZ Z whomc't-may concern r Be it known that I D Hnnnn r CHESTER a citizen-0i the United States, residing in" Buffalo, in the county'oi Erie and-State of New York, have invented certain new and useful In'iprovements in Duplex Strainers, of which the following is a specification.

The present invention relates to apparatus for tilteringor straining. v I

A leading object oi": the present invention is .to furnish in a duplexstrainer an organization ot structural members adapted .for economical manufacture and for etlective=operation when duly assembled, this mechanismcomprising operative details for shitting the flow through one or another of a plurality of strainer chambers, or for so locating the valves that the flow may be through either of two chambers-eta twine chamber.

A further object is to provide for using:

duplicate valve chests and flow-directing heads, one oneitherside of a central chambersmen'iber; said heads. being of such construction that they are readily applicable to'strainer chambers of different proportions and of' diiierent heights, as occasion may from time to time-require. 'lhus-thesaid heads are in the nature'ol valvechests, and

these are herein shown :provided with means for operatingthe valves baclcand forth between two positions andalso with means .i or

pressing the valve on its seat in each-0st its terminal positions. 1

I attain :these 'obgectsand such other objects and advantages as mayappear in the course otthe subjomed description by way .Figure 6, is a sectional view on the line G-6 of Fig. :1. v r Similar reference characters-denote similar parts throughout the several views.

The invention comprises a case or housing.

formed by casting, having the body portion 10, oval in end'view, which has arranged transversely thereofthetwin cylindrical portions 11 and. 12, joined together foralpon tion of their "circumferences as at 'l3,,and5 providing, when viewed as in Fig-1,15%? st-antially ii-shapedbosses or .extensionsof the body portion .10,-there"being. formed within the body. portion 10. and cylindrical portions 11 and-12 a box-like interion seen in Fig. 5, having outwardly curving; exten sions ll and 15. divided intotwin chambers 16 andil'Z, or chambers of like contour'and. dimensions, by the partition wall 18 extendingfrom the bottom of the box-like interior to. near fthe This box-like interior. is.

[)OptllBPEOfdll theline of connection between 1 1 the cylindrical portions 1 1 and 112. a Each of the chambers 16 andl'? has. there} in atop plate 19 provided with a centralopening 20,.the top plate havingiin its uliper.

side the annuiar recess 21 inwhich =i-s .ar-H

ranged a water tight paekin-gsuch as 22.,

Each of the chambers 16 and 17 has an inlet 23 andan outlet 24, and each ot siid chambers has therein a Wall .25. extending from the bottom otthe chamber upwardly and-connected onone side to the body portion bythe'web 26 located at the :lower edge of the inlet- 23,;the wall jentending in a curve as shown :in Fig. 5, across the chamber 16 or as the case mayb epirom about the middle of i the gpartition: wand Son one side o-t the chamber to about .theiniiddle-l of the outwardly curving extension 14 for l on the other side of the chamber. Tlie wall 25 has at its upper endithe portion 27bit a, ledge later i mention ed which forms ,on. the wall 25 the top face 28. Eachof the=cham= bers 16and 1 7Lhas therein the ledge orfs'helt 29 having a top, face 30 on the same. plane as the top face 28, there being an ;openingl80 between the wall 25 and the ledge [29, the wall25 and ledge 29 separatingthe chamber 16 or 1.7,as thecaseinay be, into astraineror filter chamber 31 anda channel seafareing communication between said chamber; and the inlet 23, :the top faces .28 and 30.01." the wall 25 and ledge 29 providing means for: supporting thereona strainer or 'filter element in each st raineror filter chamberi Each of the cylindrical bosses or. eatensions 'll' and 12 is providedatits top open-1' ing. with a series of inwardly extendingprojections- 33 with recesses 3.4L adjoiningythe projections. r v 5 f A cover of disk form is provided for each of the eylindrical gprojectionsI11 and 12,

this cover having around its edge on its upper side a series of upwardly and outwardly extending lugs 36 which are arranged to pass through the recesses 34, and when the cover is turned, as by the bar 37 shown in Fig. 5, to engage or bind with the under sides or faces of the inward projections 33, the cover having on its under side the annular projection 38 whichengages the packing 22 inthe recess 21 of the top plate 19, the cover when the lugs 36 are engaged under the projections 33, being held in closing water tight relation to its particular cylindrical extension.

Each cover is provided on its under side with the central recessed lug 39, the purpose of which is later stated.

One feature of the present improvements relates to the manner of associating together a plurality of strainer elements, an outer strainer and a central strainer 41, to form .a strainer member whereby one of these elements, as for instance the central strainer 41, Fig. 6, operates as a means for holding in place the outer strainer element 40 which rests by means of an outwardly extending flange upon the top faces 28 and 30 of the wall 25 and ledge 29. This arrangement, as will be evident from said Fig. 6, is coactive with the cover 35, whereby the strainer chamber 16 or 17, as the case may be, is closed at the upper end thereof, the upper end of the central strainer 41 being received in the lug 39. By removing the said cover, it disengages at the lug 39 from the upper end of said central strainer element 41, and thereupon this central strainer may be lifted out of the outer strainer 40, or the two strainers may be lifted out together and afterward the central strainer removed from the outer one. In some instances the two strainers may be rigidly connected together at the bottom of the central strainer (Fig.

6), and this may be done by riveting or other well known means. It is,'however, deemed to bepreferable to make the two strainers 40 and 41 so that both are held in place by the operation of the said cover 35, as will be evident from the drawing.

Preferably, as shown in Fig. 6, the central strainer member 41 is conical in form with its enlarged lower end resting on the interior of the strainer member 40, and its diminished upper end engaged in the central recess of the lug 39, when the cover 35 is in closed position. By this conformation of the inner strainer member 41 and the lug 39, forming a position determining means, the lug 39 when in engagement with the strainer member 41 will serve, not only to anchor'the strainer members against displacement, but will also serve to position the inner strainer member 41 relative to the outer strainer member 40.

Furthermore, by this conformation and cooperation between the conical strainer member 41 with the cover 35, the passage from the fluid inlet to the fluid outlet will be effectively covered by a strainer member, and at the same time, a maximum filtering surface afforded without sacrificing any surface area of the strainer.

It will, of course,be understood that the inlet 23 or above the upper outlet 24, a valve face thus being provided on each end of the body portion. 7

A valve chest 42 is arranged on each end of the body portion, being bolted or otherwise suitably secured thereto, each valve chest having therein a slidable valve member 43. Each valve chest has an attaching flange 44 with an. opening therein for inlet or outlet as the case may be, and has on its interior the opposed dependent lugs 45 and 46 having cam faces 47 and 48 inclined in direction away from each other. The valve mci'nber 43 has in its under surface an annular recess or groove 49 having therein a suitable packing 50 for providing water tight engagement between the valve member and said plane's'urface' of the ends of the body portion 10. The valve member 43 has secured to its upper side a block 51 which is received between the inward flanges 45 and 45 of the threaded traveller 52whereby the valve member is slidably moved by the traveller 52. The traveller 52 has thereon, the support 53 which carries the roller 54 which is enga 'eable with the cam faces 47 and 48 by slidable movementof the traveller, the traveller being limited in the length of its movement by this engagement, and the valve members 43 being forced down thereby into close engagement with the valve face of the body portion 10. For moving the traveler the threaded shaft 55 is provided, this shaft being operatively supported in the valve chest in a suitable water tight manner and operated by suitable means, such as the hand wheel 56.

The valve members 43 beingfin the posi purpose.

1,582,450 a f .j-

out cessation of the straining or filterin By removing the cover appurtenant to the strainer chamber 32, the strainer element or basket of this chamber maybe removed for cleaning or other purpose.

The valve chests 42 are each shown pro-' operator may reach the valve and its accessory devices.

It will be seen that if desirable the device may be operated for flow in reverse direction to that shown in Fig. 5, by simply utilizing the outlets 24L as inlets, and the inlets 23 as outlets.

Also that the strainer chambers may be made of greater length or greater width by lengthening or widening the case or housing in its construction, no alteration of the valve chests for use with the larger construction being necessary, provided the distance over which the valve member 43 is moved to cover or uncover the inlets and outlets is maintained the same in the one construction as in the other, thus permitting the use of valve chests of standard size.

Having thus described my invention, it should be understood that there may be modifications thereof and variations therein without departing from the'spirit of the invention, or exceeding the scope of the appended claims.

IVhat- I claim and desire to protect by Letters Patent is I. In a filtering or straining device, a

housinghaving an interior provided with a fluid inlet and a fluid outlet, a wall adjacent said inlet and forming an inlet chamber adjacent said inlet" and a filter or strainer chamber separated therefrom, a ledge formed above said outlet, a filter memberextending into said filter or strainer chamber and having its upper end supported on said wall and ledge, and a cover for said housing engaging the upper end of said filter member when the cover is in closed position and cooperating with said filter member effectively to interrupt the passage of fluid from the fluid inlet to the fluid outlet. 7

2. In a filtering or straining device, a housing havingan interior provided with a fluid inlet and a fluid outlet, a wall adjacent said inlet" and forming an inlet chamber adjacent said inlet and a filter or strainer chamber separated therefrom, a ledge formed above said outlet, an outer filter member extending into said filteror strainer chamber and having an outwardly extending flange at its upper end resting on said wall and said ledge and having an inwardly extend- 1 ing'flange at its lower end, and an inner filter member extending into said outer filter member and resting on said inwardly extending-flange.

3. In a filtering or straining device, a housing having an interior provided'with a fluid inlet and a'fluidoutlet, a wall and ledge cooperating with Said housing for forming a filter or strainer chamber and providing a chamber for communicating be tween the filter or strainer member and the inlet ofthe housing, the outlet serving as the outlet for the filter or strainer chamber,

an outer filter member extending into said filter or strainer chamber and having its outer upperendsupported on said wall and ledge, an inwardly. extending support formed on the inside of the lower end of the outer 'lter member, an inner filter member extending into said outer filter member and supported on said inwardly extending supaort a cover and a 111 on said cover forreceiving a portion of said filter member to position the same in place.

I. In a filtering or straining device, a housing having an interior provided with a fluid inlet and a fluid outlet, a wall adjacent said inlet and forming an inlet chamber adjacent said inlet and a filter or strainer chamber separated therefrom, a ledge fbrmed above said outlet, an outer filter member ex tending into said filter or strainer chamber and having an outwardly extending flange at its upper end resting on said wall and said ledgeand having an inwardly extending flange at its lower end, an inner filter member extending into said outer filter member and resting on said inwardly extending flange, and a cover for said housing engaging 'the upper end of said inner filter member when the cover is in closed position and cooperating with the strainer members eflecits enlarged lower end supported-in said outer filter member, and a cover for said housing engaging the upper diminishedend of said inner filtermeinber when the cover .isin closed position to'position the inner filter member in place.

1) HUBERT CHESTER. 

